How do i turn on external speakers logitech speaker system z323 - Speakers - Audio

Hello,just bought logitect speaker system z323 power is going to speakers but i cant them through my pc what can i do ... Need a new set of speakers, considering the Microlabs FC330 or Logitech Z323 Forum Insignia 2.1 Speakers vs Logitech Z323 Speakers Fo

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